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ANOVA
Chi-Square
Pearson's Correlation
Multivariate Models
Miscellaneous
100

What types of variables does an ANOVA examine?

Categorical explanatory variable and quantitative response variable

100

What does a parameter represent? What does a statistic represent?

population; sample

100

With what type of variables do you use a Pearson's Correlation for?

Quantitative explanatory variable and quantitative response variable

100

What are the different names for an explanatory variable?

Independent and predictor

100

What axis is the explanatory variable on?

X-axis

200

When a p-value is less than 0.05, is it significant?

Yes, there is a significant difference.

200

What does a Chi-Square test show us?

Observed data to expected data to see if the discrepancy is what we expected

200

What does the variability represent?

The spread of the data

200

When the standard deviation is smaller, what does this show?

Less variability in the data

200

What type of error is it...When a null hypothesis is true, but you reject it?

Type 1 error

300

How do you report the degrees of freedom?

(x,xxxx); i.e. (1, 3407)

300

What does the central tendency represent?

the center/average

300
Describe how to know what value has the strength of correlation.

Absolute value closest to 1

300

In the multivariate model, a response variable that is quantitative is called...

a multiple regression

300

What makes up a causal model?

An explanatory variable and response variable

400

When is a post-hoc test needed?

When a variable has multiple levels

400

What does the F statistic describe?

If there is a significant different between the two groups
400

What does r2 represent? 

Amount of variability in one variable that is explained by the variability in the other variable
400

In the multivariate model, a response variable is categorical and has two categories is called...

a logistical regression

400

Describe a between groups ANOVA

Amount of difference between different groups

500
List the 4 hypothesis testing steps

Specify the hypotheses, specify the sample, assess the evidence, draw conclusions

500

What type of relationship between variables is displayed on a scatterplot?

quantitative and quantitative

500

The strength of a linear relationship between two variables is shown by...

a Pearson's correlation

500

Confounding variables must have a...

Significant correlation with explanatory variable and response variable

500

What type of error occurs when the null hypothesis is false, but is not rejected?

Type 2 error